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Road Knock Occurrence in Japan
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English
Abstract
A limited field survey was conducted to determine whether full-throttle acceleration from low engine speed is suitable for road knock tests of fuels in manual-transmission Japanese cars.
Varying knock levels, fuels, cars, and drives were used on a route typical of average Japanese driving. Knock did occur most frequently during full-throttle acceleration from low engine speed. Part throttle knock was encountered, also.
Maximum octane-number requirements of four Japanese cars were measured and were as high or higher at 2 in. Hg manifold vacuum as at full throttle. Four typical Japanese fuels were rated in the cars at both throttle settings. These tests indicated that fuel segregation may be important at both full and part throttle.
Authors
Citation
Uchinuma, K. and Nakajima, K., "Road Knock Occurrence in Japan," SAE Technical Paper 650144, 1965, https://doi.org/10.4271/650144.Also In
References
- Coordinating Research Council, Inc. “Octane Number Requirement Survey 1953-1962.”
- Coordinating Research Council, Inc. “Foreign Car Octane Number Requirement Survey 1961.”
- Bartholomew E. “New Knock-Testing Method Needed to Match Engine and Fuel Progress,” SAE Paper 285A 1961
- Toulmin H. A. Lenane D. L. “Part-Throttle Knock,” SAE Paper 128T 1959
- Caris D. F. Mitchell B.J. McDuffie A. D. Wyczalek F. A. “Mechanical Octanes for Higher Efficiency,” Fourth World Petroleum Congress, Section VI/F, Paper 3 1955
- Masterman D. M. A. Potter E. B. V Skull A. Sprake C. H. “Road Octane Number of Past, Present, and Future,” Fifth World Petroleum Congress, Section VI, Paper 8 1959